Can't update my nested model form for has_one association

Question

I try to create a nested model form for the has_one association. (i\'m using Rails 4)

In my user, and adress model i have the following :

class User          


        

Answer 1

There is an option to make it do a partial update if the record already exists:

accepts_nested_attributes_for(:address, update_only: true)

Documented here: http://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html#method-i-accepts_nested_attributes_for